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Dundasite from North Wales

Published online by Cambridge University Press:  14 March 2018

G. T. Prior
G. T. Prior*
Affiliation:
British Museum
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Extract

The mineral dundasite was first described by W. F. Petterd in 1893, a ‘Catalogue of Minerals known to occur in Tasmania’. It was found in small, silky, milk-white, spherical aggregates incrusting a ‘ferro-manganese gossan’ at the Adelaide Proprietary mine, Dundas. In this catalogue, and in a subsequent one dated 1896, it was stated, as the result of qualitative tests, to be a hydrated carbono-phosphate of lead and aluminium ; but a quantitative analysis (see below under II), made later by S. Pascoe, showed that the mineral is a hydrated carbonate of lead and aluminium, and that the traces of phosphoric acid were due to a thin coating of pyromorphite. In this analysis the water and carbonic acid were determined together, by loss on ignition, and consequently hitherto no chemical formula has been attributed to the mineral.

Type
Research Article
Information
Mineralogical magazine and journal of the Mineralogical Society , Volume 14 , Issue 65 , May 1906 , pp. 167 - 169
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1906

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References

Page 167 note 1 Papers and Proceedings of the Royal Society of Tasmania, for 1893, 1894, p. 26.

Page 167 note 2 Papers and Proceedings of the Royal Society of Tasmania, for 1902, 1903, p. 22.

Page 167 note 3 To Mr. G. J. Williams, H.M. Inspector of Mines, appears to be due the credit of having first noticed these tufts of a mineral unknown to him on some cerussite specimens from the Welsh Foxdale mine